Separate Color Node
The Separate Color Node splits an image into its composite color channels. The node can output multiple Color Models depending on the Mode property.
Standard image input.
The color model to output.
Split the input image into it’s three outputs: Red, Green, and Blue color channels.
Split the input image into it’s three outputs: Hue, Saturation, and Value color channels.
Split the input image into it’s three outputs: Hue, Saturation, and Lightness color channels.
Split the input image into it’s three outputs: Luminance, Chrominance Blue, and Chrominance Red color channels.
- Color Space
ITU 601, ITU 709, JPEG
Split the input image into it’s three outputs: Luminance, U chrominance, and V chrominance color channels.
The outputs of this node depends on the Mode property (see above).
The color channel that that is responsible for the image’s transparency.
In this first example, we take the Alpha channel and blur it, and then combine it back with the colors. When placed in a scene, the edges of it will blend in, instead of having a hard edge. This is almost like Anti-Aliasing but in a three-dimensional sense. Use this node setup, when adding CG elements to live action to remove any hard edges. Animating this effect on a broader scale will make the object appear to «phase» in and out, as an «out-of-phase» time-traveling sync effect.
This example has a Math (Multiply) node increasing the luminance channel (Y) of the image to make it brighter.
If running these channels through a Color Ramp node to adjust value, use the Cardinal scale for accurate representation. Using the Exponential scale on the luminance channel gives a high-contrast effect.